Pilot for vaporizing burners



y 1952 c. s. GREER, JR 2,602,495

PILOT FOR VAPORIZING BURNERS Filed Oct. 28, 1948 2 Sl-IEETS-SHEET l July8, 1952 c. s. GREER, JR 2,602,495

PILOT FOR VAPORIZING BURNERS 2 SHEETS-SHEET 2 OOOOOOOOOOOOOOBQB FiledOct. 28, 1948 "IDOQDOQDDOOOOIAO 01000000 00 O O OOOOOOOOOOOOOOOOI'IIIID'DQOOOO00000000OOOOOOOOOOOOODODODOU 0060 o o o i o 0000 10000 0 00 20 0 0000 o o O o O 0000 IN V EN TOR.

Carl 5. Greer, J71

porizing chamber.

roblem has been effectively pori zing pot in the efiiciency of the pilotwill be apparent from Patented July 8, 1952 ,a :1: i s

16mm i s-TAT me os; -vnrom'znvor BURNERS Carl S Greer, Jr., Albion,

Lonergan Manufacturing Company, Mich-i,- a corporation of MichiganMich., assignor to Albion,"

' Application som 28, 194 8,'SerialNo. 57,095

2 Claims. (01. is-91) This invention relates to a vaporizing pot typeburner for liquid fuel and'has for an object'the provision of animproved form of vaporization chamber in the vaporizing pot." V

Burners of the vaporizing pot t'ype usually comprise a pot having'aplurality of 'primaryfand secondary air inlet openings in the side wallsand a centrally apertured baflle dividing the pot-into a lowervaporizing chamber and an upper va- The principal problem encountered inburners of this type lies in producing a clean and stable fire at allstages of operation. It is found that dividing the'pot into lower andupper vaporizing chambers does not permit a low turndown of the fuelsupply to a pilot fire. Eddy currents form in the lower chamber belowthe'partition and either cause a smoky, sooty fire 'or at times permitthe fire to becompletely extinguished. Anything lower than anintermediate fire gives'trouble, and consequently,

necessitates burning a higher flame than necessary and the generation ofexcessive heat. Not only is there unnecessary waste, but anuncomfortable condition is created in the room. This solved by the 3provision of opposing segments at or near the floor of the pot defininglaterallyconfined areaswith a space between thesegments which acts as amixing and combustion chamber beginning at the floor at low 'fire andextending to the flame ego opening at the top of the pot at high fire.An object of this invention is to provide an improved form of vaporizingchamber-for said opposing segmentswhich is exceptionally efiicient andwhich will provide Ia pilot' flame for the va- 3 5 addi'tion to the lowflame beginni'ng atfthe floor of the pot in the space betweensaidsegments. f

A" further object of the invention is to incorporate thisvaporizingchamber'in oneof said #0 simple structure is provided segmentswhereby a I without additional parts which are apt to afiect flame ortheflame at low or high fire.

Other objects and advantages of the invention.

scription when taken in connection with the drawings which form a parthereof.

In the drawings:

the following detailed de- Figure 1 is a cross-sectional view of an oilburner embodying the present invention;

Fig; 2 is a top view in elevation ofthe vaporizing pot; I

Fig; 3 is across-sectional view taken on line 3-4 of Fig. 2 looking inarrows; and

the direction of the ed in the same manner, but, at the opposite side,

shape and type of The bottom 9 of pot 5 may rate to trough ll 'of Fig. 2looking in'the direction of thearrows.

The heater illustrated in the drawings is what is commonly called a'space'lieater." It will be understood, however, that this heater maybeof any other type and that the invention may be incorporated in centralheating units, furnaces generally, stoves, etc. As illustrated, theheater comprises a housing I, a supporting frame 2, a combustion chamber3 and'a burner chamber 4. This burner chamber'4 is disposed in pot 5supported in any suitable way in housing I this depending uponthe designof the housing and the type of heater in which this pot 5 is used. "Theshape of pot 5 will also depend upon the the heater. It is illustratedas ellipticalor oval and has a side wall 6 provided with uniformlyspaced groups of air inlet openings. These groups of air I H inletopenings are disposed at different levels, theprimary air inlet openings'l being located in rows below the sec- 8. 'If the side wall'6 is ondaryair inlet openings sheet metal, these air inlet openings maybe formedtherein before the wall is formed, but, irrespective of how the wall isformed, they may be of substantially uniform size and spacing. be acast'metal or sheet metal pan with a well I0 substantially centrallyprovided and a trough H leading thereto from one side of the pot. Asillustrated, oil line l2 will connect at l3 to supply oil at a;controlled by a suitable metering device 14. The upper-wall of pot 5.rests on side wall 6 and is in the form of an apertured flame plate ISwith a fiame opening I! and with an annular depending flange l6 holdingthe plate in position. Two accumulator segments or elements 20 and.2lare provided in burner chamber 4 and are arrow are illustrated asincluded, it willbe understood that openings of other rows'might also beincluded. Accumulator elements 20, and2l are specifically shown assubstantially. u-shaped, each with a top wall 22 and with sidewal1s,.and are seated preferably upon bottom.9 in opposing relationagainstfthe side wall 6 of pot 5. Theinside edge's'of these top and sidewalls of the .accumulator elements may bflcut somewhat arouate toconform to the shapeof side wall 6 of the pot.

Accumulator segment 21 has side walls 23 and n 24 extendingsubstantially parallel to each other and inwardly from side wall B ofpot '5. Accumulator segment 20 has one of its walls 25 constructits sidewall 26 extends at an acute angle toward the major axis or center lineof the pot. This side wall '26 is greater in length than side walls 23,24 and 25, and almost reaches the major axis of the pot, the front edgethereof being consid- 5' side Wall 26 to provide a forwardly projectingor; I0

pocket-like enclosed area 28. Trough .H runs, parallel to side wall 26and lies in this enclosed area 28.

Enclosed area '28 effectively. forms a simple vaporizing chamber definedonly rbya side] wall and a limited portion of the top wall ofone '15 ofthe segments. No added parts arerequired other than an extended sidewall and'top wall capable of turning the pilot flame at an angle to burnin the direction of the center of pot 5. It will be noted that,additional air openings 29 have been furnished in';the side wall; ,6 ofpot25 to proper mixtureatjpilot flame with minimum fuel consumption,at'this' stage without formation of smoke 'or'carbon; 1 The supplyofli'quid fuel to 'theburner chamber 4 may be controlled-by suitableadjustment of the metering device 14. The, liquid fuel entering atl31will vaporize and form a combustible mixture "andburn at low or"pilot flame at and slightly to the rear of the forwardedge of the ;top;wall 22 at the extended portion 21 of vaporizing chamber'28; 'At thisstage of operation, a minimum consumption of oil takes place; and,;inactual operation, it is found that the arrangement of the parts providesfor a consumption as-lowas 1 cc; of: oil per minute withoutsmoke-oracarbon beingprodiioed. Thefiame may continue toburn at-3a lowpilotstage indefihitelyjwith a ,clea-r,. smokeless appearance, and themixture; will be adequate to effect complete combustion: Bylinprovidethenecessaryvolume of; air to assure a creasing thesupply of liquid fuel,the pilot flame will increase untilthe flame either is held at in.-termediate" stage; whichis within the'zo'ne-defined by the space betweenthev accumulator elemehts' 2'0 and 2 I and in the vicinity of their .topwalls" 22, 'or is'permitted to rise in bdrnerchamber I until it burns atand above 'openinglliin flame plate- ['5' where combustion is thencom'pleted-in combustion chamber 3 atjhigh fire stage.Accumulator'elements Bland 2 I serve todirect the air enter ng the lowerprimary air inlet openings T embracedby 'theseelements to the spacethere etween to mix witlithe vaporizedgoil rising from well In. Thecombustible mixture at intermediate fire will burn in this s a eslightly above or at the level of; top walls 22 andconsume "at thisstage, say; between 6 and 8 cc'. of liquid fuel per minute, without the.flame smoking #071 producing carbon. Accumulator elements, and 2 I willdirect a somewhat uniform flow of air for;-

ward and prevent'undesirable eddy currents. fAs the fuel supplyincreases, the level of the, flame, willincrease sothat theairfsuppliedby the upper primary "air inlets T will mix with thevaporized fuel'to provide a completely combustible. mixture. Withltheflame atj'op'e'ning l! and burning in combustion chamber, 3,. thesecondary airv inlets 8 will supply additional air'to the mixture andassure complete combustion, the flame at this high stage consumingbetween 35 and 45 cc.- of liquid fuel per minute.

It is not necessary to go from pilot flame to intermedia'te stage.Merely increasing the supply of .period ,of increasing, pilot flame, the

combustion of the mixture produced liquid fuel slightly will increasethe pilot flame during mild weather when little heat is desirable. Theburner may operate economically at minimum flame to generate the heatnecessary for the room without being compelled to generate excessiveheat by the use of a larger flame and thus *causeunnecessary waste. qTheease of controlling minim-um flame and :of controlling oil consumptionfrom this exceptionally low pilot to an intermediate stage withoutrequiring the intermediate stageas a starting flame to avoid smoke andcarbon, are obviously the result of the arrangement, of,the partsincluding the elements 20$;and ,2il and the vaporizing chamber 28forming a part of the element 20.

Thepotiancl its accumulator elements, together with the simple form ofvaporizing chamber'ZB disclosed, may obviously be incorporated in anyburner whether in a space heater, stove orfurnace. These parts maybeproportioned toiprovide a burnerof a desirable capacitythat willburnliquid fueleconomically and with mini mum fuel consumption 1 Thevaporizing chamberlil is simple and is easy to form, As-previouslystated, additional parts; heretofore found necessary to fornr avaporizing chamber in a} vaporizing pot have;,;been eliminated Thesimple pilot structure'is brought about by the advantageous form,-of;;tl-1e accumulator segmentswhereby the-top wall;s2-2;of oneof -theaccumulator segmentsmay be ex.- tended far enough about, the innerperiphery of pot 5 so that there will be,providema. resulting side Wall-25; of a lengththat-wil1 form a vaporizing chamber. of adequateproportions permitting adequate vaporization and proper mixture capableof being burnedat pilot stage without smoke and-carbon. 7 maybeincreased froman. extremely low; stage by varyingodegrees until, theintermediateflame stage is reached with'outthe flame smoking or withoutproducing carbon or soot. During this 7 4 accumulator elements supplyenough air to,-efiect; complete H V V and hold the generation-of :vaportothe vicinity. of -well; It). In thismanner, control at low flamestagesmay be had to vpreventL'fluttering and v aconsequent incomplete burningthat would otherwise produce smoke and. carbon.

Without further elaboration, theforegoing will gist of my invention thatby applying current-knowledge, readesame for use under varying condiso.fully explain the others-may, ily adapt th .tions ofs erVice-Withouteliminating certain feae tures, which may properlys be said toconstitutethe essential items of 'novelty involved, which items are intended to bedefined andsecured to me by the following claims.

. 1.. A liquid fuel burner comprising, in combination,.a combustion potof elongated cross section and having a bottom Wall, a sidewall and anapertured flame plate atthe-top of said side wall, a plurality ofspacedair inlet circumferentially about said side wall, segmentsdisposed adjacent said bottom wall and extending upwardly therefromalong a portion of said side wall and spaced onopposite sides of thelongitu dinal axisof saidpot and about theair inlet openings disposedinsaid portions, sald segments having opposed side walls substantiallyat their ends and a top wall extending from one (side wall to theotherside wall, one of saidyside walls-of one of said segments beingturned inwardlytohe PilOt :flame' openings disposed ward the verticalcentral axis of the pot and toward the longitudinal axis of said pot andextendedclose to said longitudinal axis, said segmentstop wall beingcurved at said one end also toward said longitudinal axis to meet theinner edge of said turned side wall, and means to deliver a regulatablequantity of fuel to said pot bottom adjacent to said one side wall andwithin the last said segment.

2. Aliquid fuel burner comprising, in combination, a combustion pot ofelongated cross section and having a bottom wall, a side wall and anapertured flame plate at the top of said side wall, a plurality ofspaced air inlet openings disposed circumferentially about said sidewall, segments disposed against said bottom wall and extending upwardlytherefrom along a portion of said side wall and spaced on opposite sidesof the longitudinal axis of said pot and about the air inlet openingsdisposed in said portions, said segments having opposed side wallssubstantially at their ends and a top wall extending substantially fromone side wall to the other side wall, said side walls acting as the feetof said one segment to support the latter resting upon said, bottom wallof said pot, one of said side walls of one of said segments being formedat an angle with respect to the other side wall and turned inwardlytoward the vertical central axis of the pot and having its inner edgecloser to the longitudinal axis of said pot than the inner edge of theother side wall and extended close to said longitudinal axis, saidsegments top wall being curved at said one end also toward saidlongitudinal axis to meet the inner edge of said turned side wall, atrough in said bottom wall within said one segment but adjacent to saidangularly formed side wall, and means for supplying a regulatablequantity of fuel to said trough.

CARL S. GREER, JR.

REFERENCES CITED The following references are of record in the file 0fthis patent:

UNITED STATES PATENTS

